JP5702171B2 - Fire disaster prevention device, electrostatic spraying head, and electrostatic spraying method - Google Patents

Description

The present invention relates to a fire disaster prevention apparatus, a charging spraying head, and a charging spraying method in which a water-based fire extinguishing agent containing water, seawater, a fire extinguishing agent, and the like is charged and sprayed from a head.

  Conventionally, in the event of a fire, by charging the extinguishing agent particles sprayed from the charging spray head, the Coulomb force acting between the extinguishing agent particles and the fire extinguisher and smoke particles is used, and the three-dimensional and high power to the combustion product It is known that a high fire extinguishing and smoke extinguishing performance can be obtained by increasing the efficiency of the wetting effect and the smoke capturing effect (Patent Document 1).

  FIG. 8 shows a conventional charge spraying head. In FIG. 8, the charge spreading head 100 has a head main body 136 screwed and fixed to the tip of a falling pipe 134 connected to the pipe from the pump unit, and an inner side of the head main body 136 is insulated via an insulating member 141. The water-side electrode portion 140 is incorporated.

  A ground cable 150 drawn from a voltage application unit (not shown) is connected to the water side electrode unit (extinguishing agent side electrode unit) 140 through the insulating member 141, and the water side electrode unit 140 is connected to the ground side. doing.

  An injection nozzle 138 is provided on the lower side of the water-side electrode unit 140 in the figure, and includes a nozzle rotor 138a provided inside the water-side electrode unit 140 and a nozzle head 138b provided on the tip side. The injection nozzle 138 receives the pressure-supplied extinguishing agent from the falling pipe 134, converts it into a swirling flow by the nozzle rotor 138a, and then injects it from the nozzle head 138b to convert the extinguishing agent into a particle group flow. And spray.

A cover 142 made of an insulating material is fixed to the injection nozzle 138 with a screw through a fixing member 143, and a ring-shaped induction electrode portion 144 is incorporated into an opening on the lower side of the cover 142 to stop the cover. Screwed together with the ring. The ring-shaped induction electrode portion 144 forms an opening through which the fire-extinguishing agent spray particles from the spray nozzle 138 pass at the center of the ring-shaped main body. An electrode application cable 148 from a voltage application unit provided outside is connected to the ring-shaped induction electrode unit 144.

When spraying the fire extinguishing agent from the charging spray head 100, the water-side electrode portion 140 is set to the ground side at 0 volts, and the ring-shaped induction electrode portion 144 has a direct current, alternating current, or pulse of about several KV to several tens of KV, for example. An applied voltage (charging voltage) is applied. By applying this voltage, an external electric field is generated between both electrodes, and the extinguishing agent is affected by the external electric field through an injection process in which the extinguishing agent is converted into a particle swarm from the injection nozzle 138. The charged particle swarm can be sprayed to the external target area (protective compartment).

JP 2009-106405 A

  According to such a conventional spraying of a fire extinguishing agent by means of a charged spraying (spraying) head, for example, when the fire extinguishing agent is water, the amount of water required for fire extinguishing or smoke suppression is compared with the amount of spraying water required by an uncharged spraying head. Can be greatly reduced. However, when the scale of a fire is large, the amount of water required by the charged spraying head is considerably smaller than that by an uncharged spraying head, but the minimum amount of heat generated by the fire can be absorbed. It is necessary to disperse the amount of water from which the total specific heat and latent heat of vaporization can be obtained. If the amount of water is insufficient, the desired effect cannot be obtained. Thus, when the scale of the fire is large, it is natural that a charged spraying head with a large amount of water is required.

  However, in the conventional charging / spreading head 100 shown in FIG. 8, the water flow is rotated by the nozzle rotator 138a of the head main body 136, and the particle group flow is generated by spraying and radiating from the spray nozzle 138 using centrifugal force. In this conventional electrification spray pattern, the charge amount per unit water volume decreases as the spray amount increases, and the fire extinguishing and smoke eliminating effect due to coulomb force is enhanced. The problem that the action is reduced has been confirmed by experiments of the present inventors.

FIG. 9 shows a specific charge obtained by measuring the average charge amount per unit spray amount of charged spray water when the charging voltage applied to the conventional charge spray head 100 shown in FIG. 8 is constantly +5 KV by the Faraday cage method. As the spray amount increases (the head becomes larger), the specific charge indicating the average charge amount is smaller.

  Further, in the charge spraying head 100 that applies the rotation to the conventional water flow and sprays and radiates using the centrifugal force from the spray nozzle 138, the spray angle (downward spread angle) of the extinguishing agent is about 90 ° at most, and the flying Since the distance is also relatively short, there is a problem that the charged fire extinguishing agent cannot be spread over a wide range.

  Moreover, in the conventional electric field spraying head, it is set as the omnidirectional spraying which spreads the charge-extinguishing agent in the entire circumferential direction which is 360 degrees in the horizontal direction. However, depending on the protection section, the electric field spraying head is close to the partition wall. In such a case, it is left as a problem to solve the problem of carrying out charging spraying with a predetermined directivity in the horizontal direction.

The present invention is a fire disaster prevention apparatus (equipment) that secures a sufficient charge amount even when the spray amount increases and exhibits a high fire extinguishing and smoke eliminating effect using Coulomb force and enables charge spraying having a predetermined directivity. An object is to provide a charging spraying (spraying) head and a charging spraying (spraying) method.

(Fire disaster prevention equipment)
The present invention
A fire extinguisher supply facility for supplying a water-based fire extinguisher via a pipe;
An electrifying spraying head that is installed in a protective compartment and is charged and sprayed on fire-extinguishing agent spray particles pressurized by a fire extinguishing agent supply facility;
A voltage application unit for applying a charging voltage to the charging and spreading head;
In a fire disaster prevention device equipped with
The electrostatic spraying head
A nozzle for injecting fire extinguishing agent into the external space;
A fire extinguishing agent side electrode portion that is arranged inside the nozzle and contacts the extinguishing agent;
A deflecting spray member for spraying the fire extinguisher sprayed from the nozzle in a downward direction at a predetermined angle with respect to the horizontal direction in a substantially semicircular or fan shape to form a thin film flow and then split and separate into a particle group flow;
In a predetermined region of the splitting portion of the thin film flow, an arc-shaped induction electrode portion arranged to face the thin film flow ,
It is provided with.

Here, the deflecting and spreading member is provided behind the opening portion of the nozzle for injecting the fire extinguishing agent downward in the vertical direction, the vertical surface extending substantially at a predetermined angle with respect to the opening portion, and the vertical surface. And an inclined surface having a predetermined inclination angle downward with respect to the horizontal direction .

  The induction electrode part is arranged in a substantially semicircular or fan shape on the upper side in the vicinity of the splitting and separating part of the thin film flow formed by the deflector.

  In addition, the induction electrode portion may be arranged in a substantially semicircular or fan shape below the splitting separation portion of the thin film flow formed by the deflector.

Induction electrode unit has a conductive, metal, resin, fiber bundles, Ri one or complexes der rubber is coated with an insulating material so as to be electrically insulated from the fire extinguishing agent to be sprayed .

  The extinguishing agent side electrode portion is a part of the extinguishing agent supply flow path or a nozzle.

  The voltage of the extinguishing agent side electrode portion is set to a predetermined reference value, and a predetermined charging voltage is applied to the induction electrode portion. A predetermined charging voltage in the form of direct current, alternating current or pulse is applied to the induction electrode section.

(Charging spray head)
The present invention, in a charging spraying head that is installed in a protective section and sprays the sprayed particles of the fire extinguisher supplied by a fire extinguishing agent supply facility by applying a charging voltage from a voltage application unit.
A nozzle for injecting fire extinguishing agent into the external space;
A fire extinguishing agent side electrode portion that is arranged inside the nozzle and contacts the extinguishing agent;
A deflection spraying member that sprays a fire extinguisher sprayed from a nozzle in a downward direction at a predetermined angle with respect to the horizontal direction into a substantially semicircular or fan shape to form a thin film flow, and then split and separate into a particle group flow;
In a predetermined region of the splitting portion of the thin film flow, an arc-shaped induction electrode portion arranged to face the thin film flow ,
It is provided with.

  Other features are basically the same as in the case of a fire prevention device.

(Charging sprayer)
The present invention
A spray agent supply facility for supplying a water-based spray agent via a pipe;
A charged spraying head installed in a spraying section and charged by spraying spray particles of spraying agent supplied by a spraying agent supply facility;
A voltage application unit for applying a charging voltage to the charging and spreading head;
In the electrostatic spraying device equipped with
The electrostatic spraying head
A nozzle that sprays the spray agent into the external space;
A spraying agent side electrode part that is arranged inside the nozzle and contacts the spraying agent;
A deflecting spraying member for spraying the spraying agent sprayed from the nozzle in a downward direction by a predetermined angle with respect to the horizontal direction in a semicircular or fan shape to form a thin film flow and then split and spray into a particle group flow;
In a predetermined region of the splitting portion of the thin film flow, an arc-shaped induction electrode portion arranged to face the thin film flow ,
It is provided with.

  Other features are basically the same as in the case of a fire prevention device. However, fire extinguishing agents in fire disaster prevention equipment shall be read as spraying agents.

(Charging spray head)
The present invention is a charging spraying head that is installed in a spraying section and sprays and sprays spray particles of spraying agent supplied by a spraying agent supply facility by applying a charging voltage from a voltage application unit,
A nozzle that sprays the spray agent into the external space;
A spraying agent side electrode part that is arranged inside the nozzle and contacts the spraying agent;
A deflecting spraying member for spraying the spraying agent sprayed from the nozzle in a downward direction by a predetermined angle with respect to the horizontal direction in a semicircular or fan shape to form a thin film flow and then split and spray into a particle group flow;
In a predetermined region of the splitting portion of the thin film flow, an arc-shaped induction electrode portion arranged to face the thin film flow ,
It is provided with.

  Other features are basically the same as in the case of a fire prevention device. However, fire extinguishing agents in fire disaster prevention equipment shall be read as spraying agents.

  According to the present invention, when a charging spray head is installed near the wall of a protective compartment, the fire extinguishing agent ejected from the nozzle of the charging spray head is substantially semicircular or in a predetermined direction by a deflector serving as a deflecting spray member. While forming a thin film flow spreading in a fan shape, placing an induction electrode near the splitting separation part where the thin film flow is converted into a particle group flow, applying an external electric field and charging it, while being a head with a large amount of spraying, Charge distribution with a large charge amount having directivity spreading in a predetermined direction can be performed.

In addition, by setting the shape of the deflecting spray member that deflects the fire extinguisher sprayed from the nozzle into a thin film flow in any given direction, it is possible to easily achieve charge spraying with an arbitrary directivity angle, coupled with an increase in the amount of water spray. Sufficient flight distance can be obtained, and it is possible to obtain a high fire extinguishing and smoke extinguishing effect using Coulomb force by spraying a charge extinguishing agent over a wide range as required.

Explanatory drawing which showed embodiment of the fire disaster prevention equipment by this invention Explanatory drawing which took out and showed the protection area A of FIG. Explanatory drawing which showed embodiment of the charge distribution head by this invention Explanatory drawing which took out and showed the nozzle part provided in the electrification spraying head of FIG. A graph showing the relationship between the spray amount and specific charge according to the present embodiment in comparison with the conventional head The time chart which showed the applied voltage supplied to the charge distribution head of this embodiment Explanatory drawing which showed other embodiment of the charging spreading head by this invention. Sectional view showing a conventional electrostatic spraying head A graph showing the relationship between the amount of spraying by a conventional charging spraying head and the specific charge

  FIG. 1 is an explanatory view showing an embodiment of a fire disaster prevention device (fire disaster prevention equipment) according to the present invention. In FIG. 1, the charging spraying heads 10 according to the present embodiment are installed on the ceiling side near the walls of the protection areas A and B in a building, for example, a computer room. A fire extinguishing agent spray having a predetermined directivity is applied to the area.

  A pipe 16 is connected via a manual valve (gate valve) 13 from a pump unit 12 installed to a water source 14 that functions as a fire extinguisher storage / supply facility. The pipe 16 is connected to a pressure regulating valve 30 and an automatic opening / closing valve 32 after branching. And connected to the charging and spreading head 10 installed in each of the protection areas A and B. The water source 14 stores water, seawater, or other water-based fire extinguishing agents.

  In each of the protection areas A and B, a dedicated fire detector 18 serving as an input signal source for controlling the extinguishing agent spraying from the charging spraying head 10 is installed. Further, an interlocking control relay device 20 is provided for each of the protection areas A and B, and a dedicated fire detector 18 is connected to the signal line. The interlock control relay device 20 is further connected with a manual operation box 22 for performing spray control from the charge spray head 10 by manual operation.

  The interlock control relay device 20 is connected to the signal lines from the dedicated fire detector 18 and the manual operation box 22 in this way, and the signal lines for applying and controlling the charging drive voltage to the charging spraying head 10; A signal line for controlling opening / closing of the automatic opening / closing valve 32 is drawn out.

  Further, a fire detector 26 of the automatic fire alarm facility is installed in the protection area A, and is connected to a sensor line drawn from the receiver 28 of the automatic fire alarm facility. In addition, although the fire detector 26 of the automatic fire alarm facility is not provided in the protection area B, it is a matter of course that it may be provided as necessary.

  On the other hand, the interlock control relay device 20 installed corresponding to the protection areas A and B is connected to the system monitoring control panel 24 by a signal line. A receiver 28 of an automatic fire alarm facility is also connected to the system monitoring control panel 24. Further, the system monitoring control panel 24 connects the pump unit 12 to the signal line to control the pump start / stop of the pump unit 12.

  FIG. 2 is an explanatory view showing the protection area A in FIG. On the ceiling side near the wall of the protection area A, the charging spray head 10 is installed with the central side of the protection area set as the charging spray direction. The ceiling side pipe (falling pipe 34 in FIG. 3) to which the charging spraying head 10 is connected is connected to the pipe 16 from the pump unit 12 shown in FIG. 1 via the pressure regulating valve 30 and the automatic opening / closing valve 32. Yes.

  In addition, a voltage application unit 15 is installed in the upper part of the vicinity of the charging / spreading head 10, and as will be clarified later, a predetermined voltage is applied to the charging / spreading head 10, and ejection and discharge from the charging / spreading head 10 is performed. The fire extinguishing agent is charged so that it can be sprayed. A dedicated fire detector 18 is installed on the ceiling side of the protection area A, and a fire detector 26 of an automatic fire alarm facility is also connected. The voltage application unit 15 may be provided integrally with the charging / spreading head 10.

  FIG. 3 shows an embodiment of the charging / spreading head 10 shown in FIGS. 1 and 2, FIG. 3 (A) shows a longitudinal section, and FIG. The plane seen from the (floor side) is shown.

  In FIG. 3, the charging and spreading head 10 has metal bodies 36 and 38 divided into upper and lower parts connected and fixed by bolts 37, and the body 36 is attached to the tip of a falling pipe 34 connected to the pipe 16 from the pump unit 12. Screwed and fixed. A cylindrical extinguishing agent side electrode portion 46 is incorporated in the internal flow path of the bodies 36 and 38. The extinguishing agent side electrode portion 46 is made of a conductive metal material, and further covered with an insulating material, and is electrically insulated from the metal bodies 36 and 38.

  As shown in FIG. 2, the extinguishing agent side electrode unit 46 is connected to a ground cable 54 drawn from the voltage application unit 15 installed near the outside. The extinguishing agent side electrode portion 46 is grounded by the connection of the ground cable 54.

  The nozzle portion 40 is disposed at the front end of the internal flow path of the body 38 disposed at the lower portion via the insulating spacer 44 following the extinguishing agent side electrode portion 46.

  As shown in FIGS. 4A (A) to (C), the nozzle part 40 is a stepped cylindrical body having a large diameter at the top and a small diameter at the bottom, and an inlet 43 is opened at the top and cut to the bottom. A notch 47 is provided, and a deflector 42 is integrally formed as a part thereof, and a nozzle hole (nozzle opening) 41 is opened toward the deflector 42 inside the cylinder. FIG. 4C shows a cross section viewed from the lower side of the nozzle hole opening position in FIG.

  In the present embodiment, the deflector 42 forms a substantially vertical vertical deflector surface 42a behind the opening of the nozzle hole 41, and subsequently follows the vertical deflector surface 42a and an inclined deflector surface 42b having an inclination angle α downward with respect to the horizontal direction. The fire extinguisher ejected from the nozzle hole 41 is applied to the deflector 42 so that the horizontal direction has a substantially semicircular or fan-shaped directivity angle θ, and the vertical direction is obliquely downward. Is converted into a thin film flow 56 (FIG. 3A) having an inclination angle α and radiated.

  The vertical deflector surface 42a of the deflector 42 sets a horizontal directivity angle of θ = 180 degrees, which is approximately 90 degrees (deg) on the left and right with respect to the directivity direction center 60 indicated by the arrow in FIG.

  Here, the horizontal directivity angle θ is formed so as to have an arbitrary angle of 90 degrees or less to the left and right with respect to the directivity direction center 60 as necessary, so that a predetermined directivity angle of θ = 180 degrees or less is obtained. It can also be given. For example, when it is desired to reduce the directivity angle θ, the angle θ of the vertical deflector surface 42a of the deflector 42 with respect to the directivity direction center 60 may be set to a predetermined angle of 180 degrees or less as shown in FIG.

  Further, the directivity angle θ may be 180 degrees or more. In this case, the angle with respect to the center 60 in the directivity direction is 90 degrees or more on the left and right, and the thin film flow spreads behind. Further, the orientation adjustment may be performed by curving the vertical deflector surface 42a into a concave shape or a convex shape. Furthermore, the directivity angle may be asymmetrical as necessary.

  Referring to FIG. 3 again, the thin film flow 56 deflected and formed by the deflector 42 is radiated as a particle group flow 58 by dividing the thin film flow 56 from the vicinity of the split separation part P, and has directivity to the protection area. Be sprayed.

  A frame 50 having a frame structure extending in a fan shape from the lower end of the body 38 along the upper side of the thin film flow 56 deflected by the deflector 42 is integrally formed, and the tip side of the frame 50 in the vicinity of the splitting separation portion P of the thin film flow 56 In addition, a semicircular ring-shaped induction electrode portion 48 shown in FIG. 3B is disposed downward and facing the thin film flow 56.

  The induction electrode portion 48 is formed of a conductive member and covered with an insulating material, and is electrically insulated from the metal frame 50 and the sprayed fire extinguishing agent.

  A voltage application cable 52 drawn from the voltage application unit 15 shown in FIG. 2 is connected to the induction electrode unit 48 arranged on the lower side of the front end of the frame 50.

  In FIG. 3, the induction electrode portion 48 is disposed, for example, in a region that is 10 mm or less upstream of the splitting portion P of the thin film flow 56, 30 mm or less downstream, and 20 mm or less from the surface of the thin film flow 56. Yes.

  Here, as the extinguishing agent side electrode portion 46 and the induction electrode portion 48 used in the charging and spreading head 10 of the present embodiment, in addition to conductive metal, conductive resin, fiber bundle, rubber, etc. It may also be a composite that combines these.

  When spraying the fire extinguishing agent from the charging spraying head 10, the voltage application unit 15 shown in FIG. 2 is operated by the control signal from the interlock control relay device 20 shown in FIG. 1, and the fire extinguishing agent side electrode unit 46 is connected to the reference potential. On the (earth) side, a DC (steady) applied voltage of about several KV to several tens of KV, for example, an applied voltage that is AC or pulsed is applied to the induction electrode portion 48. According to the inventor's experiment, the applied voltage is preferably in a range not exceeding 20 KV, but is not limited thereto.

  In this way, when a voltage of, for example, several KV is applied between the extinguishing agent side electrode portion 46 and the induction electrode portion 48, an external electric field is generated by this voltage application, and the fire extinguishing fired from the nozzle portion 40 due to this action. The agent is converted into a thin film flow 56 having a directivity spreading downward along the deflector 42 in a substantially semicircular or fan shape, and the thin film flow 56 starts to be split and separated from the vicinity of the splitting separation portion P to be converted into a particle group flow 58. Through the process, the fire extinguishing agent particles are charged, and the charged jetting particles can be sprayed to the external protection area target area.

  When the fire extinguisher sprayed from the nozzle portion 40 is deflected by the deflector 42, a part of the fire extinguisher may come into contact with the induction electrode portion 48 due to peeling or scattering, but the induction electrode portion 48 is covered with an insulating material. Therefore, the fire extinguisher can be charged without being in contact with the fire extinguisher and causing a short circuit or charge neutralization.

  FIG. 5 is a graph schematically showing an example in which the relationship between the spray amount and specific charge under a certain condition is compared between the charge spray head according to the present embodiment provided with a deflector and the conventional charge spray head without a deflector. FIG.

  In FIG. 5, a characteristic B is a characteristic of a conventional charging / spreading head, and is a case where a predetermined charging voltage is constantly applied. The specific charge indicating the charge amount greatly decreases with the increase in the spray amount per unit time. On the other hand, in the charge spray head 10 of the present embodiment, the spray amount as shown in the characteristic A, for example. The decrease in specific charge is small with respect to the increase in. In the example of FIG. 5, the specific charge (point “a” of characteristic A) of the nozzle of the present embodiment at a spray rate of 7 [liter / min] is the specific charge of the conventional nozzle at a spray rate of 1.5 [liter / min]. The level corresponds to the point B of the characteristic B).

  As described above, according to the charge spraying head 10 of the present embodiment, the problem that the charge amount per unit water amount greatly decreases as the spraying amount increases in the conventional charge spraying head is solved, and charging is performed with high efficiency. Therefore, it is possible to perform high-efficiency and large-charge-amount spraying with directivity in a predetermined direction while being a charge spray head having a large spray amount. In particular, when the charging spray nozzle is installed in the vicinity of the wall surface, it is possible to realize highly efficient spraying toward a desired target region while suppressing spraying on the wall surface side.

  Further, since the fire extinguisher sprayed from the nozzle unit 40 by the deflector 42 is converted into the particle group flow 58 through the thin film flow 56 and sprayed, the charge spraying having an arbitrary directivity angle compared to the conventional charge spraying head is achieved. It can be easily realized and the amount of water spray can be increased while suppressing charging loss, so a sufficient flight distance can be obtained, and a high extinguishing and extinguishing effect can be obtained by spraying a charged extinguishing agent at an arbitrary directivity angle in an arbitrary directivity direction. Can be obtained.

  Next, the monitoring operation of the fire disaster prevention apparatus in the embodiment of FIG. 1 will be described. Assuming that a fire F occurs in the protection area A, for example, the dedicated fire detector 18 detects a fire and sends a fire detection signal to the system monitoring control panel 24 via the interlock control relay device 20.

  When the system monitoring control panel 24 receives the fire detection signal from the dedicated fire detector 18 installed in the protection area A, the pump unit 12 is activated, the fire-extinguishing water is pumped up from the water source 14 and pressurized by the pump unit 12, and piping 16 is supplied.

  At the same time, the system monitoring control panel 24 outputs an activation signal for the charging and spreading head 10 to the interlock control relay device 20 provided corresponding to the protection area A. In response to this activation signal, the interlock control relay device 20 opens the automatic opening / closing valve 32, whereby the water-based fire extinguisher having a constant pressure regulated by the pressure regulating valve 30 is charged via the opened automatic opening / closing valve 32. As shown in FIG. 2, it is supplied to the spraying head 10 and sprayed from the charging spraying head 10 to the protection area A as spray particles (groups) with a predetermined directivity direction and directivity angle.

  At this time, the interlock control relay device 20 sends an activation signal to the voltage application unit 15 provided in the charge distribution head 10 shown in FIG. For example, an applied voltage of DC, AC, or pulse that is several KV is supplied.

  For this reason, in the electrification spraying head 10 shown in FIG. 3, the thin film flow 56 deflected and formed by the deflector 42 by jetting a water-based fire extinguisher pressurized from the nozzle portion 40 is converted into a particle group flow 58. When spraying, for example, a voltage of several KV is applied in a predetermined pattern with respect to the reference potential (ground) of the extinguishing agent side electrode unit 46 on the ring-shaped induction electrode unit 48 side that extends in a fan shape provided inside the frame 50, The external electric field generated by this voltage application can be charged and dispersed by applying it to the extinguishing agent in the vicinity of the splitting separation part P.

  As shown in FIG. 2, the fire extinguishing agent particles injected toward the protection area A where the fire F is generated from the charging spray head 10 installed on the wall are charged, so the fire is caused by the Coulomb force due to the charging. It adheres efficiently to the combustion source of F. In addition, the combustion agent adheres to all surfaces due to the wraparound effect, and the wetting effect on the combustion agent is greatly increased compared to the case where uncharged water particles are sprayed as in the prior art, and high fire extinguishing ability is exhibited.

  Moreover, since a fire extinguisher adheres and falls similarly with respect to the smoke (fire smoke) generated with combustion, a high smoke extinguishing effect is obtained. In other words, the smoke extinguishing effect in the present embodiment is such that the smoke extinguishing effect by spraying the non-charged extinguishing agent particles as in the prior art is a trapping action by stochastic collision between the extinguishing agent particles and the smoke particles. In this embodiment, smoke particles in the charged state of opposite polarity are collected by the Coulomb force of the extinguishing agent particles that are sprayed and charged, thereby exhibiting a high smoke extinguishing effect including a smoke diffusion suppressing effect. Is done.

  Further, in the charging spray head 10 of FIG. 3, for example, when the extinguishing agent side electrode portion 46 is set to 0 V and a positive voltage is applied to the induction electrode portion 48 in a direct current or pulse manner, The water particles to be charged are charged only with a negative charge.

  When fire extinguisher particles charged with the same polarity are sprayed only on negative charges in this way, repulsive force acts between the extinguishing agent particles in the space, and this reduces the probability that the extinguishing agent particles collide and grow and fall. Thus, the density of the extinguishing agent particles staying in the space is increased, so that high smoke extinguishing and extinguishing ability is exhibited. That is, by extinguishing the extinguishing agent particles with the same polarity, they can be dispersed without lowering the convective particle density due to repulsive force acting between the particles, and a high smoke extinguishing and extinguishing ability is exhibited.

  The smoke eliminating effect in the present embodiment as described above is that the smoke eliminating effect by the dispersion of uncharged water particles as in the conventional case is a capturing action by the stochastic collision between the water particles and the smoke particles. In that case, smoke particles that are also in a charged state are collected by the Coulomb force of the water particles that are charged and dispersed, and thereby a significant smoke eliminating effect is exhibited.

  The polarity of charging can be appropriately selected depending on the object to be sprayed. For example, when the polarity of the object to be sprayed is approximately positive, control is performed such that the extinguishing agent particles are charged to a negative polarity.

  FIG. 6 is a time chart illustrating an applied voltage pattern applied from the voltage application unit 15 to the charging / spreading head 10 according to the present embodiment, and voltage is applied from time t1 as follows.

  FIG. 6A shows a case where a + V DC (steady state) voltage is applied. In this case, negatively charged extinguishing agent particles are continuously dispersed.

  FIG. 6B shows a case where a DC (steady) voltage of −V is applied. In this case, positively charged extinguishing agent particles are continuously dispersed.

  FIG. 6C shows a case where an alternating voltage of ± V is applied. In this case, the negatively charged extinguishing agent particles are dispersed in accordance with the change of the alternating voltage during the positive half cycle, and the negative voltage is applied. During the half cycle period, the positively charged extinguishing agent particles are alternately sprayed according to the change of the AC voltage.

  FIG. 6D shows a case where a pulsed voltage of + V is repeatedly applied at a predetermined interval. In this case, negatively charged extinguishing agent particles are intermittently scattered, and no voltage is applied. During the period, there will be a spray of uncharged extinguishing agent particles.

  FIG. 6E shows a case in which a pulsed voltage of −V is repeatedly applied at a predetermined interval. In this case, positively charged extinguishing agent particles are intermittently dispersed and voltage is applied. During periods when there is no charge, there will be a spread of uncharged extinguishing agent particles.

  FIG. 6 (F) shows a case where a pulsed voltage of ± V is repeatedly applied alternately at a predetermined interval. In this case, the negatively charged extinguishing agent particles and the positively charged extinguishing agent particles are intervals. During the period when the voltage is not applied, the non-charged extinguishing agent particles are dispersed. A pulse voltage of ± V may be alternately applied repeatedly without providing such an interval.

  The application period and the inversion period in the applied voltage pattern illustrated in FIGS. 6C to 6F can be determined as appropriate, and a pattern obtained by combining a plurality of patterns in FIGS. 6A to 6F. And so on.

  As the voltage application unit 15 that supplies the application voltage of each pattern illustrated in FIG. 6 to the charging / spreading head 10, a commercially available boosting unit with a control input can be used. Some commercially available boosting units output, for example, DC to 20 kilovolts when DC 0 to 20 volts is applied to the input, and such boosting units can be used.

    FIG. 7 shows another embodiment of the charging / spreading head 10 shown in FIGS. 1 and 2. FIG. 7 (A) shows a longitudinal section, and FIG. 7 (B) shows the charging / spreading head 10 in a ceiling-mounted state. The plane seen from the lower side (floor side) is shown, and this embodiment is characterized in that the induction electrode is arranged below the thin film flow formed by the deflector.

  In this embodiment, a frame 50 having a frame structure extending in a fan shape from the lower end of the body 38 along the lower side of the thin film flow 56 formed by deflection by the deflector 42 is integrally formed as shown in FIG. A semicircular ring-shaped induction electrode portion 48 is disposed on the front end side of the frame 50 in the vicinity of the splitting separation portion P so as to face the thin film flow 56 or the separation splitting portion P. Other configurations and functions are the same as those in the embodiment of FIG.

  Even when the induction electrode 48 is arranged below the splitting separation portion P of the thin film flow 56 deflected by the deflector 42 as described above, the fire extinguisher sprayed from the nozzle portion 40 is applied to the deflector 42 as in the embodiment of FIG. The thin film flow 56 is converted into a thin film flow 56 having a directivity spreading downward in a fan-shaped manner, and the thin film flow 56 starts splitting separation from the vicinity of the splitting separation portion P and is converted into a particle group flow 58. The extinguishing agent particles are charged by the action of an external electric field generated by the application, and the charged extinguishing agent particles can be dispersed with directivity.

  In the above-described embodiment, the deflector 42 is formed integrally with the nozzle portion 40. However, the deflector 42 may be arranged as a separate member, or when the deflector 42 is a separate member, the frame 50 is used. It may be arranged on the side.

  In addition, the applied voltage pattern to the charging and spreading head is set such that the induction electrode side is alternately plus / minus applied voltage with respect to the extinguishing agent side electrode part, only the plus voltage is applied, or only the minus voltage is applied. Whether to do this can be determined as appropriate according to the situation on the combustion member side to be spread. Of course, the period of application and inversion can be determined as appropriate.

  In addition, the charging spraying head and the charging spraying method of the present invention can be used for various purposes only for fire extinguishing and fire spread prevention or for smoke suppression only.

  The present invention is not limited to fire extinguishing, and includes a charging spraying device (equipment) for charging and spraying a water-based spraying agent in an appropriate spraying section, a charging spraying head, and a charging method for the charging spraying device. In this case, the extinguishing agent and the extinguishing agent side electrode part in the above embodiment may be read as the spraying agent and the spraying agent side electrode part.

  In addition, a spray agent such as water or various water-based fire extinguishing agents can be applied to the fire extinguishing agent charged and sprayed by the charging spray head of the present invention.

The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Charge spraying head 12: Pump unit 13: Manual valve 14: Water source 15: Voltage application unit 16: Pipe 18: Dedicated fire detector 20: Interlocking control relay device 22: Manual operation box 24: System monitoring control panel 26: Fire Sensor 28: Receiver 30: Pressure regulating valve 32: Automatic on-off valve 34: Falling pipe 36, 38: Body 40: Nozzle part 41: Nozzle hole 42: Deflector 43: Inlet 46: Fire extinguisher side electrode part 48: Induction Electrode unit 50: Frame 52: Voltage application cable 54: Earth cable 56: Thin film flow 58: Particle group flow P: Splitting separation unit

Claims (18)

A fire extinguisher supply facility for supplying a water-based fire extinguisher via a pipe;
A charged spraying head installed in a protective compartment and charged by spraying spray particles of the fire extinguisher pressurized by the fire extinguisher supply equipment;
A voltage applying unit for applying a charging voltage to the charging and spreading head;
In a fire disaster prevention device equipped with
The charging spray head is
A nozzle for injecting the fire extinguishing agent into an external space;
A fire extinguishing agent side electrode portion disposed inside the nozzle and in contact with the fire extinguishing agent;
A deflection spraying member that sprays the fire extinguisher sprayed from the nozzle in a downward direction by a predetermined angle with respect to the horizontal direction in a semicircular or fan shape to form a thin film flow, and then split and separate into particle group flows;
In a predetermined region of the splitting portion of the thin film flow, an arc-shaped induction electrode portion disposed so as to face the thin film flow ;
A fire disaster prevention device characterized by comprising:
In the fire disaster prevention device according to claim 1, the deflection spraying member ,
Behind the opening of the nozzle for injecting the fire extinguishing agent downward in the vertical direction, a substantially vertical vertical surface extending at a predetermined angle with respect to the opening;
An inclined surface having a predetermined inclination angle downward with respect to the horizontal direction following the vertical surface;
Fire disaster prevention device characterized by forming .
The fire disaster prevention device according to claim 1 , wherein the induction electrode portion is arranged in a semicircular or fan shape above the splitting and separating portion .
2. The fire disaster prevention apparatus according to claim 1 , wherein the induction electrode portion is arranged in a semicircular shape or a fan shape below the splitting separation portion .
2. The fire disaster prevention device according to claim 1, wherein the induction electrode portion is one of a metal, a resin, a fiber bundle, rubber, or a composite having conductivity.
The fire disaster prevention apparatus according to claim 1, wherein the induction electrode portion is covered with an insulating material so as to be electrically insulated from the sprayed fire extinguishing agent .
The fire disaster prevention apparatus according to claim 1, wherein the extinguishing agent side electrode portion is a part of a fire extinguishing agent supply flow path or a nozzle.
2. The fire disaster prevention apparatus according to claim 1, wherein a voltage of the extinguishing agent side electrode portion is set to a predetermined reference value, and a predetermined charging voltage in a direct current, alternating current or pulse shape is applied to the induction electrode portion. Fire disaster prevention device characterized by doing.
In the charge spraying head installed in the protection zone and sprayed by applying the charging voltage from the voltage application unit to the spray particles of the fire extinguisher supplied by the fire extinguisher supply equipment,
A nozzle for injecting the fire extinguishing agent into an external space;
A fire extinguishing agent side electrode portion disposed inside the nozzle and in contact with the fire extinguishing agent;
The fire extinguishing agent injected from the nozzle, a deflecting spray member for spraying by dividing separated particles flow after forming a thin film stream is deflected semicircular or fan-shaped in a predetermined angle downward direction to the horizontal direction,
In a predetermined region of the splitting portion of the thin film flow, an arc-shaped induction electrode portion disposed so as to face the thin film flow ;
A charge spraying head characterized by comprising:
A spray agent supply facility for supplying a water-based spray agent via a pipe;
A charged spraying head installed in a spraying section and charged by spraying spray particles of a spraying agent supplied by the spraying agent supply facility;
A voltage applying unit for applying a charging voltage to the charging and spreading head;
In the electrostatic spraying device equipped with
The charging spray head is
A nozzle for injecting the spray agent into an external space;
A spraying agent side electrode portion disposed inside the nozzle and in contact with the spraying agent;
The spraying agent injected from the nozzle, a deflecting spray member for spraying by dividing separated particles flow after forming a thin film stream is deflected semicircular or fan-shaped in a predetermined angle downward direction to the horizontal direction,
In a predetermined region of the splitting portion of the thin film flow, an arc-shaped induction electrode portion disposed so as to face the thin film flow ;
A charging and spraying device comprising:
The charging / spreading device according to claim 10, wherein the deflection spraying member is :
Behind the opening of the nozzle that sprays the spray agent downward in the vertical direction, a substantially vertical vertical surface that spreads at a predetermined angle with respect to the opening,
An inclined surface having a predetermined inclination angle downward with respect to the horizontal direction following the vertical surface;
Charged spraying device characterized by forming
11. The charging / spreading apparatus according to claim 10 , wherein the induction electrode section is arranged in a semicircular or fan shape above the splitting / separating section .
11. The charging / spreading apparatus according to claim 10 , wherein the induction electrode section is arranged in a semicircular or fan shape below the splitting / separating section .
11. The charging / spreading apparatus according to claim 10, wherein the induction electrode portion is one of a metal, a resin, a fiber bundle, rubber, or a composite having conductivity.
11. The charging / spreading apparatus according to claim 10, wherein the induction electrode portion is coated with an insulating material so as to be electrically insulated from the sprayed spray agent .
The electrification spraying device according to claim 10, wherein the spraying agent side electrode portion is a part of a spraying agent supply channel or a nozzle.
11. The charging / spreading device according to claim 10, wherein a voltage of the spraying agent side electrode portion is set to a predetermined reference value, and a predetermined charging voltage in a direct current, alternating current or pulse shape is applied to the induction electrode portion. A charge spraying device characterized in that:
In the charging spraying head installed in the spraying section and sprayed by spraying the spray particles of the spraying agent supplied by the spraying agent supply equipment by applying the charging voltage from the voltage application unit,
A nozzle for injecting the spray agent into an external space;
A spraying agent side electrode portion disposed inside the nozzle and in contact with the spraying agent;
The spraying agent injected from the nozzle, a deflecting spray member for spraying by dividing separated particles flow after forming a thin film stream is deflected semicircular or fan-shaped in a predetermined angle downward direction to the horizontal direction,
In a predetermined region of the splitting portion of the thin film flow, an arc-shaped induction electrode portion disposed so as to face the thin film flow ;
A charge spraying head characterized by comprising:

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